Druckschrift 99811574, Professional Broadcast Antennas - Kathrein

VHF Transmitting Antenna
Polarization
174–230 MHz
H
Horizontal Radiation Patterns
Examples of typical horizontal
antenna arrays and their horizontal radiation patterns
for minimal mast dimensions.
Vertical Radiation Patterns
Examples of typical vertical
radiation patterns*) for several bays
of identical, vertically stacked
antenna arrays.
Equal power splitting
1 bay
E rel
E rel
50
50
0
0 10 20 30 40 50
α °
Systems
174 – 230 MHz
0
0 10 20 30
E rel
50
2 bays
E rel
E rel
50
E rel
50
50
E rel
50
E rel
10
10
0
0 10 20 30
3
0
dB
3
dB
0 0 0 10 20 30 40 50 α °
0
0 10 20 30 40 50
α °
50
0
0 10 20 30 40 50
α °
E rel
50
Equal power splitting
Different power splitting
4/6 P
E rel 0
0 10 20 30 40 50
α °
3 bays
E rel
50
E rel
0
0 10 20 30
50
E rel
E rel
0
0 10 20 30 40 50
α ° 50
1/6 P
50
0
0 10 20 30 40 50
α °
50
0
0 10 20 30 40 50
α °
0
0 10 20 30
1/6 P
0
0 10 20 30 40 50
α °
0
0 10 20 30 40 50
α °
4 bays
E rel
E rel
50
50
10
10
3
0
dB
3
dB
0
0 10 0 20 30 40 50 α °
0
0 10 20 30 40 50
α °
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